{ INFORMATICS.MCCME.RU
  Problem statement: http://informatics.mccme.ru/moodle/mod/statements/view3.php?chapterid=2955
  Verdict: Accepted
}
uses SysUtils, Math;
 
var
	a,b,c:longint;
 
begin
reset(input,'input.txt');
rewrite(output,'output.txt');
read(a,b,c);
dec(a,b);
if a<=0 then write(1) else write((a-1) div (b-c)+2);
end.